1221010102111 has 8 divisors (see below), whose sum is σ = 1243031589200. Its totient is φ = 1199053290240.

The previous prime is 1221010102099. The next prime is 1221010102129. The reversal of 1221010102111 is 1112010101221.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1221010102111 - 2⁹ = 1221010101599 is a prime.

It is a super-2 number, since 2×1221010102111² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1221010102091 and 1221010102100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221010102141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16130706 + ... + 16206223.

It is an arithmetic number, because the mean of its divisors is an integer number (155378948650).

Almost surely, 2^{1221010102111} is an apocalyptic number.

1221010102111 is a deficient number, since it is larger than the sum of its proper divisors (22021487089).

1221010102111 is an equidigital number, since it uses as much as digits as its factorization.

1221010102111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32337609.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1221010102111 its reverse (1112010101221), we get a palindrome (2333020203332).

The spelling of 1221010102111 in words is "one trillion, two hundred twenty-one billion, ten million, one hundred two thousand, one hundred eleven".